# SDR UALA2011032801454

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 26, 2011
- Submitted: March 31, 2011
- Operation: Air carrier
- Aircraft: [N669UA](https://openairdocs.org/aircraft/N669UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 30025
- Aircraft time: 42,812 hours, 11,305 cycles
- Engine: Pwa PW4056
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Shutoff Valve
- Part number: 7732887810
- Part serial: 47
- Condition: Faulty
- Location: Lt Duct
- Stage of operation: AP
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2011032801454

## Discrepancy

LEFT DUCT PRESSURE FLUCTUATED BETWEEN 20-40 WHEN POWER REDUCED ON APPROACH REPLACED PRSOV PER MM.  ACCOMPLISHED HIGH POWER RUN.  NO SPLIT DUCT PRESS AT ANY POWER SETTING.

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